Revert "optimize(backend): optimize /api/posts/latest-reply"

This reverts commit 1e87e9252d.

backend/src/main/java/com/openisle/config/PostDataSyncer.java

@@ -1,43 +0,0 @@
-package com.openisle.config;
-
-import com.openisle.service.CommentService;
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.springframework.boot.CommandLineRunner;
-import org.springframework.jdbc.core.JdbcTemplate;
-import org.springframework.jdbc.core.RowMapper;
-import org.springframework.stereotype.Component;
-
-import java.time.LocalDateTime;
-import java.util.List;
-
-/**
- *
- */
-@Slf4j
-@RequiredArgsConstructor
-@Component
-public class PostDataSyncer  implements CommandLineRunner {
-
-    private final JdbcTemplate jdbcTemplate;
-    private final CommentService commentService;
-    @Override
-    public void run(String... args) {
-
-        // 我们需要处理下历史数据，一些帖子的评论数量和最后回复时间可能为空
-        // 系统下次升级后，可以删掉这些代码
-        List<Long> oldPosts = jdbcTemplate.query("""
-                        select distinct p.id from posts p join comments c on p.id = c.post_id
-                        where last_reply_at is null
-                      """,
-                 (rs, rowNum) -> rs.getLong(1));
-
-        log.info("found {} old posts: {}", oldPosts.size(), oldPosts);
-        oldPosts.forEach(postId -> {
-            long cnt = commentService.countComments(postId);
-            LocalDateTime lastCommentTime = commentService.getLastCommentTime(postId);
-            jdbcTemplate.update("update posts set comment_count = ?, last_reply_at = ? where id = ?", cnt, lastCommentTime, postId);
-            log.info("update post {} success", postId);
-        });
-    }
-}